They're fast here too. My mail man picks the discs up at 3 p.m. and the next morning, I've got an email from Netflix telling me they've received them. New discs are out in the mail to me that day, so turnaround is really quick for me.
Same for us, we have a two day turn around. I put a movie in our mailbox on Monday, they send me an email early AM on Tuesday saying they’ve received it, and then Tuesday afternoon we get a “sent” email...and receive the next movie on Wednesday. Can’t beat that.